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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Mystery Creek # 199 in Washington

Stream photos

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Pycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly LarvaPycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly Larva
Dorsal view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
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27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Updates from March 29, 2004

Underwater photos by Troutnut from Mystery Creek #90 and Mystery Creek #19 in Wisconsin

A large school of water boatman swims over a strange purple substance at a crystal clear spring. From Mystery Creek # 90 in Wisconsin
This tiny brook trout fry lived in a crystal clear nursery area where a large spring flows straight from the ground. From the Mystery Creek # 19 in Wisconsin
Mystery Creek # 90 in Wisconsin
Mystery Creek # 90 in Wisconsin
The Mystery Creek # 19 in Wisconsin
Plant life thrives year-round in this spring head, which never dips far below the temperature of the ground water. From the Mystery Creek # 19 in Wisconsin
Plant life thrives year-round in this spring head, which never dips far below the temperature of the ground water. From the Mystery Creek # 19 in Wisconsin
There's a stickleback partially obscured along the bottom of this picture.
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Updates from March 28, 2004

Photos by Troutnut

Spring rains have this steelhead river up and roaring.
Spring rain has this steelhead river up and roaring.
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Updates from March 27, 2004

Photos by Troutnut

This is my dad's first brown trout on the fly, an 11 incher.
My dad plays the first brown trout he's ever caught on a fly.
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Updates from March 23, 2004

Underwater photos by Troutnut

This Ephemerella subvaria (Hendrickson) nymph picture is one of my favorites.
The white blotches on this rock are Leucotrichia caddisfly cases, and the wispy tubes are cases made by a type of midge.
This log houses several Ephemerella mayfly nymphs and, on the top right, an Epeorus mayfly nymph.
A big crayfish lurks under a log.
A water boatman flees the camera.
There are several species of caddisfly larvae and Ephemerella nymphs on this rock.
A careful look at this picture reveals at least three water boatmen swimming around.
Two Ephemerella mayfly nymphs share a piece of wood with two Taeniopterygidae stonefly nymphs.
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Updates from March 19, 2004

Photos by Troutnut

Several whitetail deer cross the river in front of me in the middle of winter.

Underwater photos by Troutnut

Some large Ephemerella mayfly nymphs cling to a log. In the background, hundreds of Simuliidae black fly larvae swing in large clusters in the current.
Three big Ephemerella subvaria mayfly nymphs share a rock with some cased caddis larvae.
There's a large Ephemerella subvaria nymph in the top left.
There's a stonefly nymph in the bottom right corner of this picture, but what's really interesting is those white blotches. They're pretty common in my Wisconsin home river river, stuck flat onto the rocks--lots of rocks have a speckled look as a result. They are microcaddis cases, made by larvae of the caddisfly family Hydroptilidae. These are made by larvae of the subfamily Leucotrichiinae, most likely the genus Leucotrichia. They spin little flat oval cases of silk tight and immobile against the rocks.
The mayfly and stonefly nymphs in this picture blend in extremely well.
A large crayfish lurks under a log which is home to several mayfly nymphs and caddisfly larvae.
A couple Sulphur (Ephemerella invaria) nymphs cling to a log.
A large Ephemerella subvaria nymphs clings to a log along with a couple smaller mayfly nymphs.
An Ephemerella subvaria nymph clings to a white rock in the foreground, and there are other nymphs in the background.
The strange tubes all over this rock house tiny midge larvae.
The top of this stump is covered with mayfly and caddisfly life.
This picture shows some of the intricate homes woven by net-spinning caddis larvae.
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